CN105220071B - A kind of low noise characteristic orientation silicon steel and its manufacture method - Google Patents
A kind of low noise characteristic orientation silicon steel and its manufacture method Download PDFInfo
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- CN105220071B CN105220071B CN201510673773.0A CN201510673773A CN105220071B CN 105220071 B CN105220071 B CN 105220071B CN 201510673773 A CN201510673773 A CN 201510673773A CN 105220071 B CN105220071 B CN 105220071B
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Abstract
The invention discloses a kind of low noise characteristic orientation silicon steel, and it includes silicon steel substrate and coated on the insulating coating on silicon steel substrate；In addition, the tension range of the insulating coating is 6 8MPa；Cu elements and S constituent contents in the silicon steel substrate meet：0.1%≤Cu≤0.5%, 0.01%≤S≤0.05%, and atomic ratio Cu/S meet：5≤Cu/S≤10.The invention also discloses a kind of manufacture method of low noise characteristic orientation silicon steel, and it includes step successively：(1) smelt, be cast as slab；(2) heat；(3) normalizing；(4) cold rolling；(5) decarburizing annealing；(6) finished products；(7) hot drawing annealing, and insulating coating is coated in silicon steel substrate surface, regulation coated weight is so that the tension range of insulating coating is 6 8MPa.Low noise characteristic orientation silicon steel magnetostriction of the present invention is small, with small vibration caused by the iron core being made from it, so as to reduce the overall noise levels of transformer.
Description
Technical field
The present invention relates to a kind of Steel material and its manufacture method, more particularly to a kind of electrical sheet and its manufacture method.
Background technology
During excitation, the process that production board change in size occurs with magnetization for orientation silicon steel production board is referred to as magnetostriction,
It is one of main source of transformer noise.As people are for the increase of energy demand and further sensitive for noise,
Cause performance of the user to transformer, the noise performance of especially transformer there are more strict requirements.At present, world wide
Interior transformer manufacturing factory, steel manufactory, university and research institution etc. have all put into substantial amounts of energy and financial resources, and expansion is relevant
Journal of Sex Research is associated between the noise performance of transformer and different affecting factors.
Magnetostrictive mechanism of production is due to number change and the rotation of 90 ° of magnetic domains of magnetic history.Orientation silicon steel magnetic
Cause the quantity that flexible deciding factor is the small additional farmland-willow leaf farmland (90 ° of farmlands) occurred between 180 ° of magnetic domains.When 90 ° of willow leaf farmland
When farmland is vertical with 180 ° of farmlands, 90 ° of farmlands are transversely elongated with thickness direction, and 180 ° of farmlands are then elongated along rolling direction.Reduce by 90 ° of farmlands
(closure domain), it becomes possible to be effectively reduced magnetostriction.In the prior art, the magnetostrictive side of reduction being currently mainly used
Method is specific as follows：
1) finished product crystal grain is lifted<001>The degree of orientation can reduce magnetostriction.Fig. 1 is shown<001>The face deviation of axle
Relation between angle beta and 90 ° of farmland volume calculated values.As shown in figure 1,90 ° of farmland volumes are reduced with angle of deviation β reduction, together
When 90 ° of farmland volumes can be reduced with rolling to the increase of tension force.It can know from Fig. 1, in the case of without outfield, reduce
(110) the deflecting angle β of [001] can minimize the magnetostriction of orientation silicon steel.
2) reducing finished product thickness reduces magnetostriction.Fig. 2 shows the thickness and Magnetostriction of steel plate finished product model
Between relation.As shown in Fig. 2 with the increase of steel plate finished product thickness, its magnetostriction can also increase therewith.Due to steel plate into
The increase of product model thickness and cause the increased principle of magnetostriction be：[100] magnetic domain constitutes the mixed and disorderly degree of steel plate materialses, its
It is the reason for producing magnetostriction：With the increase of steel plate finished product model thickness, [100] magnetic domain can also increase therewith, and surface
Closure domain [001] does not change.This means that the change that the ratio of magnetic domain [001] and [100] occurs and causes mangneto
Flexible increase (author：Philip I.Anderson, Anthony J.Moses and Hugh J.Stanbury,《Assessment
of the Stress Sensitivity of Magnetostriction in Grain-Oriented Silicon
Steel》, periodical《IEEE TRANSACTIONS ON MAGNETICS》, 2007.8 (43):3467-3476).
The magnetostrictive decline of orientation silicon steel production board can be realized by above two technical scheme, so as to realize transformation
The reduction of device noise level.
Fig. 3 shows that the elongation of orientation silicon steel production board, magnetic be close and the relation between the time.As shown in figure 3, due to mangneto
It is flexible and caused by steel plate finished product model stretch, when magnetic is close be sine curve in the case of：If magnetostriction accurately with magnetic
Induction (B) is directly proportional, then vibration only will include a kind of harmonic wave, and its frequency is twice of mains frequency, that is to say, that if
When mains frequency is 50Hz, harmonic frequency is then 100Hz.In a practical situation, due to above-mentioned relation and parabola not phase
Together, therefore transformer noise will include higher harmonics, and the frequency of higher-order wave is the integral multiple (author of fundamental wave：Gong new people,《Transformer
Noise (upper and lower)》,《Transformer》, 1980,5：51-56；).
Publication No. CN1327075A, publication date are on December 19th, 2001, entitled " low noise level transformer it is unidirectional
Property electromagnetic steel plate " Chinese patent literature disclose a kind of reduce big higher-order wave influenceed on people's sense of hearing, can effectively be reduced
The one-way electromagnetic steel plate of the low noise level transformer of noise.The one-way electromagnetic steel plate do not formed in advance glass cover layer or
After being removed after forming glass cover layer with any means, the electromagnetic steel plate is made to have used in surface coating or the like
There are more than 0.5MPa, below 4.0MPa tension force.Technical scheme disclosed in the patent document is mainly by using without bottom
Technology improves the surface smoothness of orientation silicon steel production board, to reduce magnetostrictive non-smooth degree, so as to reduce 300-
1000Hz magnetostriction speed sound pressure level, and finally reduce the overall noise levels of transformer.
In addition, Publication No. US20020012805A, publication date is on January 31st, 2002, entitled " to be used for the low noise change of tune
The american documentation literature of the grain-oriented electromagnetic steel sheet of depressor " also describes a kind of crystal grain for low noise level transformer manufacture and taken
To electromagnetic steel plate.Steel plate coated with glass-film can reduce higher hamonic wave, so as to be effectively reduced the noise of transformer.The U.S.
Technical scheme disclosed in state's patent reduces the purpose of iron loss by minute surface and big coating tension force to reach, but the technical scheme
The magnetostriction of steel plate is not reduced.
The content of the invention
It is an object of the invention to provide a kind of low noise characteristic orientation silicon steel.The low noise characteristic orientation silicon steel reduces
Magnetostriction, it is with small vibration caused by iron core made of the low noise characteristic orientation silicon steel, so that having such iron core
Transformer overall noise levels it is low.
To achieve these goals, the present invention proposes a kind of low noise characteristic orientation silicon steel, it include silicon steel substrate and
Coated on the insulating coating on silicon steel substrate；In addition, the tension range of the insulating coating is 6-8MPa；Cu in the silicon steel substrate
Element and S constituent contents meet：0.1%≤Cu≤0.5%, 0.01%≤S≤0.05%, and atomic ratio Cu/S meet：5≤
Cu/S≤10。
Because the low-order harmonic in magnetostriction waveform can mainly influence the vibration of iron core, thus, in order to reduce transformer
Noise, it is necessary to reduce the vibration of iron core, that is, reduce the low-order harmonic of magnetostriction waveform.In consideration of it, the technical side of the present invention
Case is by controlling the tension range of the insulating coating coated on silicon steel substrate between 6-8MPa, to reduce in magnetostriction waveform
Low-order harmonic, so as to reduce the vibration of iron core, and then be effectively reduced the noise level of transformer.In a practical situation, steel
The small closing structure (90 ° of magnetic domains) being made up of [100] and [010] position to magnetic domain, these magnetic domains be present in the intercrystalline in plate material
Presence be to minimize because rolling to the magnetostatic energy caused by the angle of deviation.Typical small closing structure is dagger shape magnetic domain.
Under external magnetic field, this closure domain structure can be eliminated by applying the insulating coating with appropriate tension force so that orientation silicon steel
Magnetostriction (the i.e. magnetostriction speed sound pressure level L of production boardvA) decline.
With the increase of insulating coating tension force, Magnetostriction can significantly decline first, then work as insulating coating
Tension force when reaching 8MPa, the influence of the tension force of insulating coating for the Magnetostriction of orientation silicon steel production board tends to be full
With now, even if being further added by insulating coating tension force, the Magnetostriction of orientation silicon steel production board also will not substantially occur bright
Decline aobviously.Therefore, based on technical scheme, it is necessary to by the tension force of insulating coating between 6-8MPa scopes.
In addition, by the Cu elements in silicon steel substrate and S elements in suitable scope, i.e., Cu constituent contents meet
0.1%≤Cu≤0.5%, S constituent content meet：0.01%≤S≤0.05%, and atomic ratio Cu/S meets：5≤Cu/S≤
10, improve finished product magnetic property to realize, and efficiently control crystallite dimension.
Further, the finished product magnetic property and crystallite dimension control parameter of low noise characteristic orientation silicon steel of the present invention
X meets：
X=[ln (Dave)] × P17/50/B8/B25≤0.30
Wherein, Dave represents finished product average grain size (mm)；P17/50Represent the total losses (W/Kg) under 50hz, 1.7T；
B8It is the magnetic induction intensity (T) under 800A/m to represent magnetic field intensity；B25It is the magnetic induction intensity under 2500A/m to represent magnetic field intensity
(T)。
Based on technical scheme so that the finished product magnetic property and crystallite dimension of low noise characteristic orientation silicon steel meet
Above-mentioned model formation, it is possible to achieve the reduction of magnetostriction vibration.At the same time it can also reduce finished product grain size, to reduce orientation
90 ° of magnetic domain quantity in silicon steel production board, so as to reduce the Magnetostriction of orientation silicon steel production board.Parameter X not only with
The composition of steel grade is relevant, also relevant with the manufacturing process of steel grade.
Further, in low noise characteristic orientation silicon steel of the present invention, the active ingredient of above-mentioned insulating coating
Contain phosphate.
Further, the active ingredient of above-mentioned insulating coating is phosphate, silica and chromic anhydride.
Further, the thickness H of low noise characteristic orientation silicon steel of the present invention is 0.27-0.35mm.
Further, in low noise characteristic orientation silicon steel of the present invention, each chemistry member in above-mentioned silicon steel substrate
Plain percent mass proportioning is：
C：0.055~0.080%, Si：2.8~3.5%, Mn：0.01~0.02%, Als：0.020~0.03%, N：
0.0050~0.0090%, Cu：0.1~0.5%, S：0.01~0.05%, surplus is Fe and other inevitable impurity.
Further, low noise characteristic orientation silicon steel of the present invention meets LvA(17) ＜ 55dB (A).
LvA(17) magnetostrictive vibration velocity sound of the low noise characteristic orientation silicon steel in the case where magnetic flux density is 1.7T is represented
Voltage levels, its unit parameter are dB (A).
Another object of the present invention is to provide a kind of manufacture method of low noise characteristic orientation silicon steel.Pass through the manufacturer
Method can obtain the small low noise characteristic orientation silicon steel of magnetostriction, and iron core is produced made of the low noise characteristic orientation silicon steel
Raw is with small vibration, so that the transformer overall noise levels with such iron core reduce.
In order to realize foregoing invention purpose, the present invention proposes a kind of manufacture method of low noise characteristic orientation silicon steel, its
Include step successively：(1) smelt, be cast as slab；(2) heat；(3) normalizing；(4) cold rolling；(5) decarburizing annealing；(6) finished product moves back
Fire；(7) hot drawing annealing, and insulating coating is coated in silicon steel substrate surface, regulation coated weight is so that the tension force model of insulating coating
Enclose for 6-8MPa.
Further, in the manufacture method of low noise characteristic orientation silicon steel of the present invention, in above-mentioned steps (7)
In, coated weight 6-10g/m2。
With the coated weight increase of insulating coating, the tension force of insulating coating significantly rose before this, then tended to saturation.
Therefore, although the tension force of insulating coating can increase with thickening for insulating coating, when the tension force of insulating coating tends to be full
With it is rear, the tension force of insulating coating can not significantly be increased by increasing the thickness of insulating coating simply.In addition, insulating coating
Thickness increase can also cause its lamination coefficient to decline, the overall noise levels of such transformer can rise on the contrary.Therefore, from carrying
Factor consideration of both properties of product and the manufacturing cost control of height noise properties orientation silicon steel, the coated weight of insulating coating
Control is needed in 6-10g/m2Between.
Further, in the manufacture method of low noise characteristic orientation silicon steel of the present invention, in above-mentioned steps (3)
In, using two-part normalizing treatment：1100~1200 DEG C are first heated to, is then dropped with 1 DEG C/s~10 DEG C/s cooling velocity
Temperature is to 900~1000 DEG C；Room temperature is then cooled to 10 DEG C/s~70 DEG C/s cooling velocity.
Further, in the manufacture method of low noise characteristic orientation silicon steel of the present invention, in above-mentioned steps (4)
In, cold rolling uses once cold rolling or the secondary cold-rolling with intermediate annealing step.
Further, in the manufacture method of low noise characteristic orientation silicon steel of the present invention, in above-mentioned steps (5)
In, primary recrystallization annealing is carried out at a temperature of 800~900 DEG C, is then coated with annealing separating agent.
Further, in the manufacture method of low noise characteristic orientation silicon steel of the present invention, in above-mentioned steps (6)
In, annealing temperature is 1100~1200 DEG C, is incubated 20-30h.
Further, in the manufacture method of low noise characteristic orientation silicon steel of the present invention, in above-mentioned steps (7)
In, the concrete technology of hot drawing annealing is；800~900 DEG C are first heated to, 10-30S is incubated, then with 5 DEG C/s~50 DEG C/s
Cooling rate cool to room temperature.
Low noise characteristic orientation silicon steel of the present invention reduces magnetostriction, by the low noise characteristic oriented silicon steel
Into iron core caused by it is with small vibration so that the overall noise levels of the transformer with such iron core are low.
Technical scheme reduces the low of magnetostriction vibration by the control of the tension range to insulating coating
Subharmonic, so as to reduce the vibration of iron core, and then the overall noise for reducing transformer is horizontal.
In addition, technical scheme is by controlling Cu elements in silicon steel substrate and S constituent contents in appropriate model
Within enclosing, and both atomic ratios are controlled within the scope of one, improve the finished product magnetic property of low noise characteristic orientation silicon steel.
In addition, technical scheme is vibrated by controlling crystallite dimension to reduce magnetostriction, so as to reduce silicon steel
The Magnetostriction of steel plate.
It is small and overall that magnetostriction can be obtained by the manufacture method of low noise characteristic orientation silicon steel of the present invention
The low low noise characteristic orientation silicon steel of noise level.
Brief description of the drawings
Fig. 1 is shown<001>Relation between the face angle of deviation β of axle and 90 ° of farmland volume calculated values.
Fig. 2 shows the relation between the thickness of steel plate finished product model and magnetostriction.
Fig. 3 shows that the elongation of steel plate finished product model, magnetic be close and the relation between the time.
Fig. 4 shows the pass between tension force and Magnetostriction coated on the insulating coating on steel plate finished product model
System.
Fig. 5 shows the pass between Cu constituent contents and Cu/s atomic ratios and Magnetostriction in silicon steel substrate
System.
Fig. 6 show steel plate finished product model finished product magnetic property and crystallite dimension control parameter X and Magnetostriction it
Between relation.
Fig. 7 is shown coated between the tension force of insulating coating and the coated weight of insulating coating on steel plate finished product model
Relation.
Fig. 8 shows that tension force coated on the insulating coating on steel plate finished product model and different Magnetostriction low orders are humorous
Relation between ripple.
Embodiment
Below in conjunction with brief description of the drawings and specific embodiment to low noise characteristic orientation silicon steel of the present invention and its
Manufacture method makes further explanation, but the explanation and illustration does not form improper limit to technical scheme
It is fixed.
Embodiment A1-A6 and comparative example B1-B2
Embodiment and comparative example are obtained by the manufacture method of the low noise characteristic orientation silicon steel of the present invention, it includes step
Suddenly：
1) smelt, be cast as slab, in smelting process, control each chemistry in the silicon steel substrate of embodiment and comparative example
Element matches；
2) heat：1200~1280 DEG C are heated to, 1~4hr is incubated, is rolled into strip；
3) normalizing：1100~1200 DEG C are first heated to, then cools to 900 with 1 DEG C/s~10 DEG C/s cooling velocity
~1000 DEG C；Room temperature is then cooled to 10 DEG C/s~70 DEG C/s cooling velocity；
4) cold rolling：Secondary cold-rolling using once cold rolling or with intermediate annealing step, the finished product thickness H after cold rolling are
0.27-0.35mm；
5) decarburizing annealing：Primary recrystallization annealing is carried out at a temperature of 800~900 DEG C, is then coated with annealing separating agent；
6) finished products：1100~1200 DEG C of annealing temperature, it is incubated 20-30hr；
7) hot drawing annealing and painting insulating layer coating：800~900 DEG C are first heated to, 10-30S is incubated, then with 5 DEG C/s
~50 DEG C/s cooling rate cools to room temperature, coats insulating coating in silicon steel substrate surface, regulation coated weight is in 6-10g/m2Scope
Between so that the tension range of insulating coating is 6-8MPa, wherein, the active ingredient of insulating coating is phosphate, silica and
Chromic anhydride.
It should be noted that using contactless Laser Doppler interferometry (Laser Doppler
Vibrometers magnetostriction of the embodiment A1-A6 and comparative example B1-B2 steel plate sample under the conditions of B=1.7T) is measured
Can (magnetostriction speed sound pressure level LvA), specific measuring method may refer to IEC (International
Electrotechnical Commission) technical report-IEC/TP 62581, obtain Magnetostriction (magnetic through measurement
Cause stretching speed sound pressure level LvA) be then listed in Table 1 below.
Table 1 lists each in the silicon steel substrate of embodiment A1-A6 and comparative example B1-B2 low noise characteristic orientation silicon steel
The quality percentage of chemical element is matched somebody with somebody and the other specification of low noise characteristic orientation silicon steel.
Table 1. (wt%, surplus are Fe and other inevitable impurity elements)
* note：1) X is finished product magnetic property and crystallite dimension control parameter, wherein, X=[ln (Dave)] * P17/50/B8/B25,
In the technical program X should≤0.30；2) H is the finished product thickness of low noise characteristic orientation silicon steel；3)LvA(17) it is logical for magnetization
Magnetostriction vibration speed sound pressure level when density is 1.7T, its unit parameter is dB (A)；4) tension force is coated on silicon steel base
The tension force of insulating coating on plate.
Table 2 lists the specific of the manufacture method of embodiment A1-A6 and comparative example B1-B2 low noise characteristic orientation silicon steel
Technological parameter.
Table 2.
240KVA three phase-change pressures are made using embodiment A1-A6 and comparative example B1-B2 low noise characteristic orientation silicon steel
Device, noise measuring is carried out under 50Hz, 1.7T magnetization condition, the results are shown in Table 3 after detection.
Table 3 lists the transformation assembled by embodiment A1-A6 and comparative example B1-B2 low noise characteristic orientation silicon steel
The noise performance of device.
Table 3.
| Sequence number | Noise (dB (A)) |
| A1 | 56.7 |
| A2 | 56.4 |
| A3 | 56.2 |
| A4 | 56.0 |
| A5 | 54.9 |
| A6 | 54.3 |
| B1 | 65.5 |
| B2 | 63 |
As can be seen from Table 1, by embodiment A1-A6 low noise characteristic orientation silicon steel Magnetostriction LvA(17)≤
55dB(A)。
As can be seen from Table 3, the noise of transformer is equal as made from embodiment A1-A6 low noise characteristic orientation silicon steel group
≤57dB(A).With reference to table 1 and table 3, due to the Cu constituent contents in comparative example B1, Cu/S atoms when finished product magnetic property and crystalline substance
Particle size control parameter X is beyond technical solution of the present invention limited range, therefore, by comparative example B1 low noise characteristic
The high noise for the transformer that orientation silicon steel assembles reaches 65.5dB.
Fig. 4 shows that the tension force coated on the insulating coating on steel plate finished product model with Magnetostriction (i.e. stretch by mangneto
Contracting speed sound pressure level LvA(17) relation between).
As shown in figure 4, with the increase of insulating coating tension force, magnetostriction speed sound pressure level LvA(17) before this significantly
Ground declines, and then when the tension force of insulating coating reaches 8MPa, the tension force of insulating coating is for reducing orientation silicon steel production board
The influence of Magnetostriction tends to saturation, and now, even if being further added by insulating coating tension force, the mangneto of orientation silicon steel production board is stretched
Contracting performance also will not substantially occur significantly to decline.On the contrary, when the tension force of insulating coating reaches 12MPa, orientation silicon steel
The Magnetostriction of production board can rise with the increase of insulating coating tension force on the contrary.
Fig. 5 shows Cu elements and Cu/s atomic ratios and magnetostriction speed sound pressure level L in silicon steel substratevA(17)
Between relation.
As shown in figure 5, round dot represents magnetostriction speed sound pressure level LvA(17) ＜ 55dB (A), the square mangneto that represents are stretched
Contracting speed sound pressure level LvA(17) ＞ 55dB (A), it can be seen that when Cu constituent contents meet 0.1%≤Cu≤0.5%
And atomic ratio Cu/S meets：During 5≤Cu/S≤10, the magnetostriction speed sound pressure level L of low noise characteristic orientation silicon steelvA(17)
Meet：(LvA(17)) ＜ 55dB (A).
Fig. 6 shows the finished product magnetic property and crystallite dimension control parameter X and magnetostriction speed sound of steel plate finished product model
Voltage levels LvA(17) relation between.
As shown in fig. 6, the magnetostriction speed sound pressure level L of low noise characteristic orientation silicon steelvA(17) with finished product magnetic
Can and crystallite dimension control parameter X increase and rise.When finished product magnetic property and crystallite dimension control parameter X=[ln
(Dave)]*P17/50/B8/B25When≤0.30, the magnetostriction speed sound pressure level L of low noise characteristic orientation silicon steelvA(17) ＜
55dB(A)。
Fig. 7 is shown coated between the tension force of insulating coating and the coated weight of insulating coating on steel plate finished product model
Relation.
As shown in fig. 7, with the coated weight increase of insulating coating, the tension force of insulating coating significantly rose before this, so
After tend towards stability.Although therefore, the tension force of insulating coating can thickening and increase with insulating coating coated weight, when insulation
After the tension force of coating tends to saturation, the tension force of insulating coating can not significantly be increased by increasing the thickness of insulating coating simply.
When the coated weight of insulating coating is controlled in 6-10g/m2When between scope, the tension range of insulating coating is accordingly 6-8MPa.
Fig. 8 shows that tension force coated on the insulating coating on steel plate finished product model and different Magnetostriction low orders are humorous
Relation between ripple.
As shown in figure 8, it can significantly reduce 100Hz and 200Hz magnetostriction by lifting the tension force of insulating coating
Performance, but lift influence of the tension force of insulating coating for 300Hz Magnetostriction and be basically unchanged.Therefore, by carrying
The tension force of high insulating coating can significantly reduce magnetostriction low-order harmonic (100Hz, 200Hz) noise level, thus come
The vibration of iron core is reduced, so as to reduce the overall noise levels of transformer.
It should be noted that listed above is only specific embodiment of the invention, it is clear that real the invention is not restricted to more than
Example is applied, the similar change for having many therewith.If those skilled in the art directly exported from present disclosure or
All deformations associated, all should belong to protection scope of the present invention.
Claims (16)
1. a kind of low noise characteristic orientation silicon steel, it includes silicon steel substrate and coated on the insulating coating on silicon steel substrate；It is special
Sign is：The tension range of the insulating coating is 6-8MPa；Cu elements and S constituent contents in the silicon steel substrate meet：
0.1%≤Cu≤0.5%, 0.01%≤S≤0.05%, and atomic ratio Cu/S meet：5≤Cu/S≤10；
The finished product magnetic property and crystallite dimension control parameter X of the low noise characteristic orientation silicon steel meet：
X=[ln (Dave)] × P17/50/B8/B25≤0.30
Wherein, Dave represents finished product average grain size, and its unit parameter is mm；P17/50The total losses under 50Hz, 1.7T are represented,
Its unit parameter is W/kg；B8It is the magnetic induction intensity under 800A/m to represent magnetic field intensity, and its unit parameter is T；B25Represent magnetic
Field intensity is the magnetic induction intensity under 2500A/m, and its unit parameter is T.
2. low noise characteristic orientation silicon steel as claimed in claim 1, it is characterised in that the active ingredient of the insulating coating contains
There is phosphate.
3. low noise characteristic orientation silicon steel as claimed in claim 2, it is characterised in that the active ingredient of the insulating coating is
Phosphate, silica and chromic anhydride.
4. low noise characteristic orientation silicon steel as claimed in claim 2, it is characterised in that its thickness H is 0.27-0.35mm.
5. the low noise characteristic orientation silicon steel as described in any one in claim 1-4, it is characterised in that the silicon steel substrate
In each chemical elements in percentage by mass be：
C：0.055~0.080%, Si：2.8~3.5%, Mn：0.01~0.02%, Als：0.020~0.03%, N：0.0050
~0.0090%, Cu：0.1~0.5%, S：0.01~0.05%, surplus is Fe and other inevitable impurity.
6. the low noise characteristic orientation silicon steel as described in any one in claim 1-4, it is characterised in that low noise characteristic takes
To magnetostrictive vibration velocity sound pressure level L of the silicon steel in the case where magnetic flux density is 1.7TvA(17) ＜ 55dB (A).
7. the manufacture method of the low noise characteristic orientation silicon steel as described in any one in claim 1-4, it includes step successively
Suddenly：(1) smelt, be cast as slab；(2) heat；(3) normalizing；(4) cold rolling；(5) decarburizing annealing；(6) finished products；(7) hot-drawn
Annealing is stretched, and insulating coating is coated in silicon steel substrate surface, regulation coated weight is so that the tension range of insulating coating is 6-8MPa.
8. the manufacture method of low noise characteristic orientation silicon steel as claimed in claim 7, it includes step successively：(1) smelt, casting
Cause slab；(2) heat；(3) normalizing；(4) cold rolling；(5) decarburizing annealing；(6) finished products；(7) hot drawing annealing, and in silicon
Base steel plate surface coats insulating coating, and regulation coated weight is so that the tension range of insulating coating is 6-8MPa.
9. the manufacture method of low noise characteristic orientation silicon steel as claimed in claim 6, it includes step successively：(1) smelt, casting
Cause slab；(2) heat；(3) normalizing；(4) cold rolling；(5) decarburizing annealing；(6) finished products；(7) hot drawing annealing, and in silicon
Base steel plate surface coats insulating coating, and regulation coated weight is so that the tension range of insulating coating is 6-8MPa.
10. manufacture method as claimed in claim 7, it is characterised in that in the step (7), coated weight 6-10g/m2。
11. manufacture method as claimed in claim 8, it is characterised in that in the step (7), coated weight 6-10g/m2。
12. manufacture method as claimed in claim 9, it is characterised in that in the step (7), coated weight 6-10g/m2。
13. the manufacture method as described in any one in claim 10-12, it is characterised in that in the step (3), adopt
With two-part normalizing treatment：1100~1200 DEG C are first heated to, is then cooled to 1 DEG C/s~10 DEG C/s cooling velocity
900~1000 DEG C；Room temperature is then cooled to 10 DEG C/s~70 DEG C/s cooling velocity.
14. the manufacture method as described in any one in claim 10-12, it is characterised in that in the step (5),
Primary recrystallization annealing is carried out at a temperature of 800~900 DEG C, is then coated with annealing separating agent.
15. the manufacture method as described in any one in claim 10-12, it is characterised in that in the step (6), move back
Fiery 1100~1200 DEG C of temperature, it is incubated 20-30hr.
16. the manufacture method as described in any one in claim 10-12, it is characterised in that in the step (7), heat
Stretching annealing process is specially：800~900 DEG C are first heated to, 10-30s is incubated, then with 5 DEG C/s~50 DEG C/s cooling rate
Cool to room temperature.
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| JP7028326B2 (en) * | 2018-07-31 | 2022-03-02 | 日本製鉄株式会社 | Directional electrical steel sheet |
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| CN112159935B (en) * | 2020-09-30 | 2021-11-09 | 武汉钢铁有限公司 | High-magnetic-induction oriented silicon steel with low noise characteristic and production method thereof |
| WO2022113517A1 (en) * | 2020-11-27 | 2022-06-02 | Ｊｆｅスチール株式会社 | Grain-oriented electromagnetic steel sheet and method for manufacturing same |
| CN114561512B (en) * | 2022-01-26 | 2024-04-05 | 武汉钢铁有限公司 | Method for improving magnetostriction of oriented silicon steel sheet by scoring decarburized sheet with laser |
| CN114807559B (en) * | 2022-05-09 | 2023-07-18 | 国网智能电网研究院有限公司 | Low-loss low-magnetostriction oriented silicon steel material and preparation method thereof |
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